Comparative study of nitrogen, carbon and phosphorus species in aerosol between Pengjia Island and Keelung

• Main Authors: Yang, Chung-Yuan, 楊宗原
• Other Authors: Chen, Hung-Yu
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/rc78gb

碩士 === 國立臺灣海洋大學 === 海洋環境資訊系 === 104 === This study investigates the total suspended particulates both in Pengjia Island and Keelung in the same time in order to analyze the differences and connection among nitrogen, carbon and phosphorus species between the two areas during the period of November 2014 to May 2015. Moreover, selecting the continental-derived sample to estimate the concentration and comprehend the discharge situation of the target species in Keelung. First, this study use the air mass back trajectory (AMBT) to determine the sources of suspended particulates for classifying and use the connection with meteorological data to determine the main source and difference of the ions between two stations, and then explore nitrogen, carbon and phosphorus species concentration between two stations. Furthermore, this study discuss the concentration inside and outside Keelung area. Finally, the connection of nitrogen, carbon and phosphorus species concentration can be analyzed between two stations by using the simple linear regression analysis. The results indicate that wind direction, wind velocity and rainout are the factors which influence the sea salt ions average concentration. The nss-SO42- average concentration in Keelung is higher than in Pengjia Island because of the influence of fossil fuel combustion. However, nss-Ca2+ and nss-K+ most come from the outside area. The results show that there is no obvious meaning among WSIC, nss-Ca2+, nss-K+ three factors because the R2 is less than 0.4 by the simple linear regression analysis. Additionally, The PO43- concentration in Pengjia Island is 1.55 times bigger than in Keelung, but the other targets concentration in Pengjia Island are 0.62-0.88 times smaller than in Keelung. PO43- and WSIC concentration inside Keelung account for 8% and 7% of total concentration and the others account for 19%-36% of total concentration, which reveals that the problem of air pollution in Keelung should be considered. The monthly average flux of PO43- in Pengjia Island is 1.17 times bigger than in Keelung, and also the nitrogen concentration is higher due to the influence of migrant birds. Furthermore, the excess N in this study area and phosphorus species in Pengjia Island can improve the marine productivity.